Dial-Up Networking

• Dial-Up Networking is not installed properly.
• How Dial-Up Networking works
• Won't Save Password and/or Username
• Won't Open the Dial-Up Networking folder
• Does not let you Enter a Password (no password box) 
  Quick Fix: Make a new connection, or un/reinstall DUN)

Error Messages

• Dial-Up Networking could not complete a connection to the server, check your configuration and try again
• [602] The port is already open/In Use.
• [629] The port was disconnected by the remote machine.
• [630] The port was disconnected due to hardware failure.
• [633] The port is already in use or is not configured for Remote Access dial out.
• [645] Internal authentication error.
• [666] Your modem is not functioning.
• [676] The line is busy.
• [678] There is no answer.
• [680] There is no dial tone.
• [691] Access denied because username and/or password is invalid on the domain.
• [692] Hardware failure in port or attached device.
• [720] No PPP control protocols configured.
• [731] The protocol is not configured.